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Melraidin: then you dont understand what a PDF is
postscript level 1 ,2 or 3, is a RIP'able language, PDF is not, you cannot execute PDF, you can not write programs in PDF, you can't upload a PDF to a printer and have it execute code then generate output from it.
PDF is more like HTML on steriods, its is not a replacement for postscript, its a simpler form, PDF has only recently stated to add prepress features to its format, PS has had it for about 18 years, PS3 is very powerful and is the choice of most professional printers for prepress.
Though using PDF can cut down the costs at lot its considerably easier to screw it up, since its not as flexible and has many runtime options for conversion to and from it that can seriously alter the output.
I've yet to come across a PDF i can't convert to PS, if that were so how could you print a PDF on a PS only printer, (it doesn't convert it to a DDB frst)
(portable document format, postscript language)
ie ones a format, ones a language.
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